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Luis Fernando Ibarra Chami vs Marcus Vinicius M Goncalves
48th World Junior Championship (2009), Puerto Madryn ARG, rd 1, Oct-22
Trompowsky Attack: General (A45)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Oct-26-09  buhomorado: 13... , ♘c5???

Awesome blunder!!!, but what would happen after:

12... ♗g7!?

Oct-29-09  syracrophy: 13...♘c5 was just a cheap tactical try. The idea was 14. ♕xe5 ♘xd3+ regaining the queen, with a piece of advantage. But, obviously, that was too easy to see for a master-class player like Ibarra Chami.

The simple 14. ♗b5+! vanishes all the "idea" of Black, and now is white who wins the opponent's ♕!

Nov-09-09  notyetagm: 13 ... ?


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13 ... ♘d7-c5??


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14 ♗d3-b5+! 1-0


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Baburin in Chess Today 3289:

<but instead he (Black) came up with a tricky idea, which had a huge
hole in it:

14.Bd3-b5+!

This is it. Clearly Black
counted only on 14.Qf5xQe5?? Nc5xBd3+
15.Ke1-e2 Nd3xQe5+.>

The tactical problem with 13 ... ♘d7-c5?? is that it exposes the uncastled Black e8-king to a <CHECK>, meaning that the White d3-bishop can leave the d3-square and hence <PROTECT> the d3-checking square <WITH TEMPO>, so that there is no ... ♘c5-d3+ <ROYAL FORK> nonsense.

Nov-09-09  notyetagm: 13 ... ♘d7-c5??


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This is a great example of the kind of mistakes amateurs make all the time: <THEY RELY ON THEIR OPPONENT TO MAKE A NON-FORCED MOVE>.

13 ... ♘d7-c5?? would be a *brilliant* move *iff* 14 ♕f5x♕e5?? was <FORCED>, but White is <NOT> <FORCED> to play that move and instead wins instantly by playing a different move, 14 ♗d3-b5+!.

14 ♗d3-b5+! 1-0


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Nov-09-09  notyetagm: Game Collection: CHECKS! CHECKS! CHECKS! CHECKS! CHECKS! CHECKS!

14 Bd3-b5+! lets White protect d3-forking square with tempo

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Featured in the Following Game Collection [what is this?]
13 .. Nd7-c5?? exposes Black e8-king to fatal check 14 Bd3-b5+!
from OPENING LINES: EXTENSION & EXPOSURE (E&E) by notyetagm


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